Roaster for coffee.



n0. 73,757. Patented May 7, HM. B. BURNS,

ROASTEB FOR COFFEE. A umim'flled Aug. 25, 1900.) (No Model.) 2Shasta-Sheet l.

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No. 673,757. Patented May 7, I90l.

R. BURNS. ROASTER FOR COFFEE.

(Application'flled Aug. 25, 1900.)

Sheet 2.

2 Sheet:-

( No llodel.)

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rates Parent ROBERT BURNS, OF NEW YORK, N. Y.

ROASTER FOR COFFEE.

SPECIFICATION forming part Of Letters Patent N0. 673,757. dated May 7,1901.

Application filed August 25, 1900. Serial No. 28,073. (No model.)

To all whom it may concern.-

Be it known that 1, ROBERT BURNS, a citizen of the United States,residingin the borough of Manhattan, in the city, county, and btate ofNew York, have invented new and useful Improvements in Roasters forCoffee and other Materials, of which the following is a specification.

This invention relates to a roaster adapted for thorough utilization orexhaustion of heat; and the invention resides in the novel features ofconstruction set forth in the following specification and claims andillustrated in the annexed drawings, in which- Figure l is a sectionalside elevation of a roaster embodying this invention. Fig. 2 is a frontelevation of Fig. 1. I Fig. 3 is asection along mm, Fig. 1. Fig. 4 is asection along at.

1n the drawings is shown a frame or support a, to which is fixed ajacket I), having an outlet or flue c, Fig. 1, for a purpose hereinafterset forth. The frame has bearings or supports 01 for shafts or gudgeonse and f, which are both shown as being hollow. These shafts, with theirroaster, are rotated by suitable meansas, for example, a pulley-wheel g.

The roaster is shown with a side or cylindrical shell h, an end 11, andoutlets or hollow arms 76, as also with an inner cylinder Z. Thiscylinder Z can be secured in place by suitable means, as by beingslipped into engagement with tube-pieces m, secured to and rotating withroaster h. The arms is communicate with the interior of the innercylinder, as seen at n in Fig. 1.

The shaft 6 or its collar 0, Fig. 1, connects by spokes or a spider pwith the roaster or center part m, and air can enter past these spokesinto the inner cylinder Z. Air can likewise enter through hollow shaftf. A burner orcombustible-supply tube q extends through shaft 6 into theinner cylinder and is shown with a stop-cock or valve 7". This burner orheating-tube q supplies combustible or heat to the interior of innercylinder Z. Of course this tube q could be provided with jets or burnersor adapted to burn any suitable combustible-as, for example, vapor orgas. A match or igniter can be introduced through shaft f to ignite thecombustible in cylinderl or at burner q.

The combustion in cylinder l can be kept alive by the fuel supplied fromburner q, with the air entering past the spiderp and through the shaftf. The products of combustion passing off through the hollow arms 76enter the space between roaster h and jacket I: and escape through fluec and chimney 1, extending from pipe 2.

The roaster, as kn own, has blades 3, and the steam or vapor coming offthe contents of the roaster during the operation passes by arms 7c,through hood 4, into said pipe 2 to escape at chimney 1. This chimney isof course of suflicient size or cross-section to take off the dischargeboth from flue c and from pipe 2. The head 5 can be rotatable to bringits opening above or below the shaft; but this feature is not claimed,having been set forth in United States Patent No. 241,294, granted May10, 1881. The hood 4 has a counter or balance weight 6.

By applying heat'at theinside of the roaster a thorough utilization ofthe heat is effected. As the heat from the inner cylinder does notescape directly to the chimney, but first passes through arms 70 andalong the outside of the roaster within jacket Z), the roaster iseffectively heated. The outlets it from the innor or heat-generatingcylinder Z through roaster h need not be at the end of the roaster, butcould be located at any other suitable point. The arrangement ofheating-cylinder Z as shown enables inner application of heat withoutany flame contacting with the coifee or contents of roaster h.

The construction can of course be modified. In the present embodiment ofmy invention I have shown the roaster h as supported by hollow shafts;but it will be understood that I do not limit myself to suchconstruction, as other supporting means for the roaster may be employed.Such variations are known in the art and do not affect the invention.

The bearing (1 for shaft f is carried by a cross-bar 7, Fig. 2,supported on or bolted to frame a, and about this bearing is seated thehub of head 5, as seen in Fig. 1.

In the drawings I have shown no means whereby access maybe had to theinterior of the roaster; but it will be understood that some such meansis contemplated, the same being so Well known in the art that it isdeemed unnecessary to illustrate the same.

As the inner cylinder has its shell or wall closed or imperforate, flameor combustion products from this inner cylinder cannot pass off into theroaster, but must travel from the inner cylinder to outlets 7c andthence along to flue 0, so as to insure thorough utilization of heat.

What I claim as new, and desire to secure by Letters Patent, is

1. A roaster having an open-ended inner cylinder and hollow shafts and aheating-pipe or burner extended through one of the shafts andterminatingivithin the cylinder,the other shaft being made to open intothe inner cylinder for igniting and supplying air substantially asdescribed.

2. A roaster having an open-ended iinper-' fora-te inner cylinder andhollow shafts, and a heating-pipe or burner extended through one of theshafts and terminating within the inner cylinder, said inner cylinderbeing made to communicate at both endswith the outer air substantiallyas described.

3. A roaster having an imperforat'e inner cylinder open at both ends, aheat-supply for the inner cylinder, and outlets from the inner cylinderextended through the roaster substantially as described.

4. A roaster having an imperforate inner cylinder open at both ends, aheat supply and outlets for the inner cylinder, and a jacket about theroaster, said outlets being made to lead into the space between theroaster and jacket substantially as described.

5. A roaster having an imperforate inner cylinder open at both ends, aheat supply and outlets for the inner cylinder and a jacket about theroaster, said jacket having a fine substantially as described.

6. A roaster having an imperforate inner cylinder open at bothends, aheat supply and outlets for the inner cylinder, a jacket with which theoutlets communicate, and a hood or pipe having a chimney, said jackethaving a flue made to communicate with the chimney substantially asdescribed.

7. A roaster having an imperforate inner or heating cylinder open atboth ends, a jacket with which the heating-cylinder is made tocommunicate, a hood or pipe with which the roaster is made tocommunicate, a flue for the jacket and a chimney for the hood'or' pipesub stantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ROBERT BURNS.

Witnesses:

W. C. HAUFF, CHAS. E. POENSGEN.

